Conclusion: proportion of hepatolithiasis and gallstone was equal, and cholesterol stone was the main type in Hainan province.
结论海南地区胆石的分布部位胆囊结石与胆管结石比例接近；类型以胆固醇类结石为主。
Results:Bacteria were found in the superficial layer of the cholesterol stone, seldom found in the cholesterol crystal and could be seen in the core of cholesterol stone yet.
结果：胆固醇结石表层结构内均能够发现细菌，胆固醇结晶中少有细菌，结石核心可发现细菌。
Objective: to observe the morphological change of bacteria in the cholesterol stone under electron microscope and to explore the action of bacteria in the formation of stone.
目的：通过电镜观察胆固醇结石内的细菌形态学变化，探索细菌在成石中的作用。
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